Short answer
- There is no single grams to tablespoons conversion factor, and any page that gives one number for all ingredients is giving a number that is only right for one ingredient. A tablespoon measures volume. A gram measures weight. The bridge between them is density, and density is different for every ingredient. One US tablespoon is 14.7868 milliliters. The weight of a level US tablespoon of an ingredient is its density in grams per milliliter multiplied by 14.7868. Water, with a density of about 1 gram per milliliter, weighs about 14.8 grams per US tablespoon. All purpose flour weighs about 7.8 grams per US tablespoon. Honey weighs about 21 grams per US tablespoon. Same spoon, nearly a fourfold difference from the lightest common ingredient in this guide to the heaviest. To convert tablespoons to grams for a named ingredient, multiply the number of tablespoons by that ingredient's grams per tablespoon from the table in this article. To convert grams back to tablespoons, divide the gram weight by the same figure. Two examples show the shape of the method: 3 tablespoons of granulated sugar is 3 x 12.5 = 37.5 grams, and 100 grams of granulated sugar is 100 / 12.5 = 8 tablespoons exactly. For everyday cooking, the table values are close enough. For baking, and for any recipe that gives grams in the first place, a kitchen scale is more accurate than any spoon conversion.
By Emma Hudson
If you have searched how many tbsp to grams and found three different answers on three different pages, the pages are not necessarily careless. They are answering three different questions, because a tablespoon of honey, a tablespoon of flour, and a tablespoon of water are three different weights that happen to share one volume. This guide explains why no single conversion factor can exist, sets out the density method that produces a correct answer for any ingredient, gives a per ingredient table built from United States Department of Agriculture reference weights, and works the conversion in both directions. It also covers the two traps that spoil most spoon conversions: packing and sifting flour, and the difference between a US tablespoon and a metric tablespoon.
Why Volume and Weight Need a Bridge
Grams and tablespoons do not measure the same property, so no direct conversion between them can exist in the way that one exists between inches and centimeters: an inch and a centimeter both measure length, so one fixed number connects them. A gram measures mass, the amount of matter in a portion. A tablespoon measures volume, the amount of space a portion fills. Two portions can fill exactly the same space and contain very different amounts of matter, because one is packed with heavy material and the other is mostly air held between light particles.
Density is the property that connects the two: mass divided by volume, usually stated in grams per milliliter for kitchen ingredients. Flour is the everyday example of a light ingredient: a spoonful is flour particles plus a large amount of trapped air, so its bulk density is only about 0.53 grams per milliliter. Honey is the everyday example of a dense ingredient: a thick liquid sugar solution with almost no trapped air, at about 1.42 grams per milliliter. The spoon does not change. What fills it changes, and the weight changes with it.
This is why the shortcut 1 tablespoon equals 15 grams causes quiet damage in recipes. It is roughly right for water and milk, and wrong for nearly everything else: used for flour it overstates the weight by more than 90 percent, and used for honey it understates it by about 29 percent.
The Density Method, Step by Step
The full method has four steps, and every conversion in this article follows them. Once the steps are clear, the ingredient table below stops looking like a list to memorize and becomes what it really is: the same calculation repeated for different densities.
Step 1: Fix the spoon. Decide which tablespoon the recipe means. This article uses the US tablespoon throughout, and its volume is fixed by definition. One US tablespoon is exactly one half of a US fluid ounce. The National Institute of Standards and Technology, NIST, lists the fluid ounce as 29.57353 milliliters in its tables of units of measurement, so one US tablespoon is 29.57353 / 2 = 14.7868 milliliters, stated in full as 14.78676478125 milliliters. NIST also notes that the measuring tablespoon is an imprecise unit whose equivalent is rounded to 15 milliliters in its equivalents table, which is one reason rounded figures circulate so widely.
Step 2: Name the ingredient and find its density or its reference weight. Density for a kitchen ingredient is a bulk density: the weight of the ingredient as it normally sits in a spoon or a cup, air gaps included, not the density of a single solid crystal or grain. The most reliable source is a reference weight for a known volume, such as the grams per cup or grams per tablespoon published in USDA FoodData Central. Every value in the table below comes from a named FoodData Central entry.
Step 3: Multiply volume by density. Grams per tablespoon equals density in grams per milliliter multiplied by 14.7868. For water the calculation is 1.00 x 14.7868 = 14.7868 grams, about 14.8 grams. For honey, the FoodData Central reference weight is 21 grams per tablespoon, which implies a density of 21 / 14.7868 = 1.42 grams per milliliter, and the density route gives the same answer in reverse: 1.42 x 14.7868 = 21.0 grams, rounded to one decimal place.
Step 4: Scale to the quantity in the recipe, and round once at the end. Multiply the per tablespoon weight by the number of tablespoons, or divide a gram weight by the per tablespoon weight to go back to spoons. Rounding the per tablespoon figure first and then multiplying builds a small error into every spoonful.
A worked density example pulls the steps together. Suppose a recipe needs 4 tablespoons of olive oil. FoodData Central lists olive oil at 13.5 grams per tablespoon, an implied density of 13.5 / 14.7868 = 0.91 grams per milliliter. The quantity step is 4 x 13.5 = 54 grams. By the density route instead, 4 tablespoons is 4 x 14.7868 = 59.1472 milliliters, and 59.1472 x 0.91 = 53.8 grams, which matches the 54 gram answer within the rounding of the density figure. Either route is correct: the reference weight route is faster, and the density route checks that the reference weight makes sense.
US, Metric, and Australian Tablespoons
The tablespoon itself is not the same size everywhere, and this is the second reason published tables disagree. The US tablespoon is 14.7868 milliliters. The metric tablespoon, used in the United Kingdom and in metric recipe writing generally, is exactly 15 milliliters. The Australian tablespoon is 20 milliliters, which makes it the outlier: it is about 35 percent larger than the US tablespoon.
The US and metric spoons differ by only about 1.4 percent, because (15 - 14.7868) / 14.7868 = 0.0144, or 1.44 percent. For water, that is the difference between 14.8 grams and exactly 15 grams. For flour, a metric tablespoon holds about 7.9 grams against about 7.8 grams for a US tablespoon. That gap is smaller than the variation caused by how a spoon is filled, so US and metric figures can usually be used interchangeably with the difference noted. The Australian spoon cannot be treated that way. A level Australian tablespoon of flour holds about 10.6 grams, and one of honey holds about 28.4 grams, because each US figure scales by 20 / 14.7868 = 1.3526. Following an Australian recipe with US spoons, or the reverse, changes every spooned ingredient by roughly a third or a quarter.
Every figure in the rest of this article is for the US tablespoon of 14.7868 milliliters, level, unless a section says otherwise.
Grams per Tablespoon by Ingredient
The table below gives the reference weight of one level US tablespoon for common ingredients. Each value comes from USDA FoodData Central: some are published directly as a tablespoon weight, and the rest are computed from its published cup weight divided by 16, because one US cup contains exactly 16 US tablespoons. Values are rounded to one decimal place. The implied density column is the table weight divided by 14.7868, rounded to two decimal places: the densities run from about 0.37 to about 1.42, so the weights must run just as widely.
| Ingredient | Grams per 1 US tablespoon | Implied density (g/mL) | Basis in FoodData Central |
|---|---|---|---|
| Water | 14.8 | 1.00 | 8 fluid ounces weigh 237 g, so 1 tablespoon is about 14.8 g |
| Milk, whole | 15.0 | 1.01 | Published tablespoon weight 15.0 g |
| Butter, salted | 14.2 | 0.96 | Published tablespoon weight 14.2 g |
| Olive oil | 13.5 | 0.91 | Published tablespoon weight 13.5 g |
| Honey | 21.0 | 1.42 | Published tablespoon weight 21.0 g |
| Peanut butter, smooth | 16.0 | 1.08 | 2 tablespoons weigh 32 g |
| Granulated sugar | 12.5 | 0.85 | 1 cup weighs 200 g, divided by 16 |
| Brown sugar, packed | 13.8 | 0.93 | 1 packed cup weighs 220 g, divided by 16 |
| Brown sugar, unpacked | 9.1 | 0.61 | 1 unpacked cup weighs 145 g, divided by 16 |
| Powdered sugar, unsifted | 8.0 | 0.54 | Published tablespoon weight 8.0 g |
| All purpose flour | 7.8 | 0.53 | 1 cup weighs 125 g, divided by 16 |
| Cornstarch | 8.0 | 0.54 | 1 cup weighs 128 g, divided by 16 |
| Cocoa powder, unsweetened | 5.4 | 0.37 | Published tablespoon weight 5.4 g |
| Baking powder | 13.8 | 0.93 | 1 teaspoon weighs 4.6 g, times 3 teaspoons |
| Table salt, fine | 18.0 | 1.22 | Published tablespoon weight 18.0 g |
Read two rows together and the point is made. A tablespoon of cocoa powder weighs 5.4 grams. A tablespoon of honey weighs 21 grams, nearly four times as much. A tablespoon of fine table salt, at 18 grams, weighs more than twice as much as a tablespoon of flour at 7.8 grams. If a recipe gives flour by the tablespoon and you convert using the sugar row, you will weigh out far too much flour. There is no flaky salt row in the table because no directly comparable reference weight was used for it in this guide: flaky crystals trap air and weigh much less per spoon than fine crystals, so salt is the ingredient where the exact product matters most and weighing is the safest habit.
Brown sugar carries two rows because the recipe wording changes the answer. Packed brown sugar gives about 13.8 grams per tablespoon, and the same sugar loose and unpacked gives about 9.1 grams. The word packed in a recipe is not decoration. It is a 50 percent instruction, since 13.8 / 9.1 = 1.52, rounded.
Converting Tablespoons to Grams: Worked Examples
The rule is one line: grams equals tablespoons multiplied by the grams per tablespoon for that ingredient. Each example below states its ingredient first, because the ingredient is part of the calculation.
Example 1: Granulated sugar
A recipe adds 3 tablespoons of granulated sugar. From the table, sugar is 12.5 grams per tablespoon. The working is 3 x 12.5 = 37.5 grams, or about 38 grams rounded to the nearest gram.
Example 2: All purpose flour
A sauce is thickened with 4 tablespoons of all purpose flour. Flour is 7.8 grams per tablespoon. The working is 4 x 7.8 = 31.2 grams. Compare Example 1: the same 3 to 4 spoon range in sugar gave 37.5 grams, and 4 tablespoons of sugar would be 4 x 12.5 = 50 grams. Four spoons of flour and four spoons of sugar differ by nearly 19 grams.
Example 3: Honey
A dressing uses 2 tablespoons of honey. Honey is 21 grams per tablespoon. The working is 2 x 21 = 42 grams. Honey adds weight faster than any other common ingredient in the table, which is why small spoon counts of honey still register clearly on a scale.
Example 4: Butter, and the stick check
A recipe melts 6 tablespoons of butter. Butter is 14.2 grams per tablespoon. The working is 6 x 14.2 = 85.2 grams, or about 85 grams. The full stick check confirms the row: FoodData Central lists one stick of salted butter at 113 grams, and a stick is 8 tablespoons, so 8 x 14.2 = 113.6 grams, which matches the listed stick weight within rounding.
Example 5: Cocoa powder
A drink mix uses 3 tablespoons of unsweetened cocoa powder. Cocoa is 5.4 grams per tablespoon, the lightest row in the table. The working is 3 x 5.4 = 16.2 grams. Three tablespoons sounds substantial as a volume and is only about 16 grams as a weight, which is exactly the kind of surprise the density method exists to prevent.
Example 6: Water from first principles
One tablespoon of water is the density method in its simplest form: 1 x 14.7868 milliliters x 1.00 grams per milliliter = 14.7868 grams, about 14.8 grams. With a metric tablespoon the same working gives 1 x 15 x 1.00 = 15 grams exactly. The 0.2 gram gap is the entire US to metric spoon difference in a single line.
Converting Grams to Tablespoons: Worked Examples
The reverse rule is also one line: tablespoons equals grams divided by the grams per tablespoon for that ingredient. The answers are often awkward fractions, and that awkwardness is information. It usually means the recipe was written for a scale, and the spoon result should be treated as an approximation.
Example 1: Flour
A recipe needs 50 grams of all purpose flour. Divide by the flour row: 50 / 7.8 = 6.41 tablespoons, or about 6.4 tablespoons. In kitchen terms that is 6 tablespoons plus a little over 1 teaspoon, since 0.41 x 3 = 1.23 teaspoons. The fractional spoon is hard to level accurately, which is one reason flour is the ingredient this guide most strongly recommends weighing.
Example 2: Granulated sugar
A recipe needs 100 grams of granulated sugar. The working is 100 / 12.5 = 8 tablespoons exactly. Sugar is one of the few ingredients where the reverse conversion often lands on a clean spoon count, because 12.5 divides many round gram figures neatly.
Example 3: Butter
A recipe needs 30 grams of butter. The working is 30 / 14.2 = 2.11 tablespoons, or about 2 tablespoons plus a third of a teaspoon, since 0.11 x 3 = 0.33 teaspoons. For butter there is a better route than spoons altogether: cut from a stick by weight or by the tablespoon marks printed on most stick wrappers, which are based on the same 14.2 gram tablespoon.
Example 4: Honey
A recipe needs 50 grams of honey. The working is 50 / 21 = 2.38 tablespoons, or about 2 tablespoons plus just over 1 teaspoon, since 0.38 x 3 = 1.14 teaspoons. Honey also clings to a spoon, so weighing it in the mixing bowl avoids both the fraction problem and the clinging loss.
Example 5: Table salt, the warning example
A recipe needs 15 grams of fine table salt. The working is 15 / 18 = 0.83 tablespoons, or about 2.5 teaspoons, since 0.83 x 3 = 2.5. If the same weight were measured with a light flaky salt at roughly half the weight per spoon, a spoon count computed from the fine salt row would add close to twice the volume of salt crystals. For salt in brines, cures, and ferments, where concentration matters for safety as well as flavor, weigh the salt and use the salt type the recipe names.
Why a Scale Beats Spoons for Flour
Flour is where spoon conversion is weakest, and it is worth understanding why, because flour is also the ingredient recipes most often give by volume in the United States and by weight almost everywhere else.
The reference weight used in this guide, 125 grams per cup from FoodData Central, describes flour in a standard settled state. Real flour in a home kitchen is rarely in that state. Flour settles in the bag during storage and transport, it aerates when it is stirred or sifted, and it compacts when a measuring cup is scooped through it and pressed against the side of the bag. Each action changes how much flour fits in the same spoon or cup without changing the volume reading at all. The volume stays one tablespoon. The weight moves.
In baking, that movement matters because flour is usually the largest ingredient and because the ratio of flour to liquid, the hydration, controls the texture of breads, cakes, and pastry. A conversion that is off by 10 or 15 percent on the flour changes the dough itself, not just the seasoning. A scale removes the variable entirely: 125 grams of flour is 125 grams however the bag was stored.
The practical rule is simple. If a recipe gives flour in grams, weigh it. If it gives flour in cups or spoons and the result matters, weigh it anyway using the reference weight, 125 grams per cup or about 7.8 grams per tablespoon. Spoon conversion for flour is a reasonable fallback for sauces, dusting, and small thickening amounts. It is a poor foundation for a loaf.
How Packing and Sifting Change the Result
Packing and sifting are the two handling effects that move a spoon weight after the ingredient itself has been fixed, and FoodData Central documents the sifting effect directly in its powdered sugar entry: 1 cup unsifted weighs 120 grams and 1 cup sifted weighs 100 grams. The same sugar, the same cup, a 20 gram difference created only by sifting, a 20 percent change on the sifted figure. A single table row is a reference state, not a promise about every spoonful.
Packing works in the opposite direction. Pressing a dry ingredient into a spoon or cup drives out air and raises the weight per measure. Brown sugar is the standard case: about 13.8 grams per tablespoon packed against about 9.1 grams unpacked. Flour responds to the same physics. A spoon dipped and scooped carries compacted flour, a spoon filled lightly and leveled with a straight edge carries less, and a spoon of sifted flour carries less still.
Three habits keep handling error small. Fill spoons and cups by spooning the ingredient in, rather than scooping with the measure itself. Level every dry measure with a straight edge, unless the recipe asks for a heaped or packed measure. Follow the recipe’s state words exactly: sifted and packed are instructions with numbers attached, as the figures above show. Where the state word is missing and the quantity is large, weigh instead of guessing.
When to Weigh Instead of Converting
Conversion tables are the right tool for everyday cooking, small quantities of forgiving ingredients, and recipes written in spoons in the first place. Weighing is plainly better in four situations. Baking, especially bread, cakes, and pastry, is the first, for the flour reasons set out above. Salt in curing, brining, and fermenting is the second, because salt concentration there is a safety matter as well as a flavor matter. Any recipe that gives grams in the first place is the third: the gram figure is the author’s primary measurement, and converting it to spoons adds error in exchange for nothing. Small quantities of potent ingredients are the fourth: yeast, baking soda, spices, and leaveners are used in amounts where a fraction of a spoon is a large percentage of the dose.
A basic kitchen scale costs little and removes the entire density problem at a stroke. If you cook from recipes that mix grams and tablespoons, it is the most useful purchase this subject points to, ahead of any conversion table, including this one.
Common Mistakes to Avoid
Using 1 tablespoon equals 15 grams for every ingredient is the most common error. That figure belongs to water and, roughly, to milk. It overstates flour by more than 90 percent, since (15 - 7.8) / 7.8 = 0.92, and understates honey by about 29 percent, since (21 - 15) / 21 = 0.29.
Using a heaped tablespoon where a table assumes a level one is the second error. Every value in this article is a level tablespoon, leveled with a straight edge for dry ingredients. A heaped spoon holds an uncontrolled extra amount, so no table can correct for it.
Mixing tablespoon sizes is the third error. The US tablespoon is 14.7868 milliliters, the metric tablespoon is 15 milliliters, and the Australian tablespoon is 20 milliliters. The first two can usually share figures. The Australian spoon is about 35 percent larger and cannot share them.
Converting salt by the wrong salt type is the fourth error. Fine table salt is listed at 18 grams per tablespoon in this guide, and flaky salts weigh much less per spoon because the flakes trap air. Check which salt a recipe means, and weigh salt whenever the quantity matters.
Rounding too early is the fifth error. Keep full precision through the working and round only the final answer. Rounding 7.8 grams to 8 grams for flour and then multiplying by 12 tablespoons gives 96 grams against the fuller figure of 93.6 grams, a gap created entirely by the early rounding.
Quick Reference
1 US tablespoon = 14.7868 milliliters = 3 teaspoons = one half of a US fluid ounce. 1 metric tablespoon = 15 milliliters exactly. 1 Australian tablespoon = 20 milliliters. Grams per US tablespoon: water 14.8, milk 15.0, butter 14.2, olive oil 13.5, honey 21.0, peanut butter 16.0, granulated sugar 12.5, brown sugar packed 13.8, brown sugar unpacked 9.1, powdered sugar 8.0, all purpose flour 7.8, cornstarch 8.0, cocoa powder 5.4, baking powder 13.8, fine table salt 18.0. Tablespoons to grams: multiply by the ingredient figure. Grams to tablespoons: divide by the ingredient figure. Name the ingredient first, every time.
Frequently Asked Questions
How many tbsp to grams is the conversion?
There is no single conversion, because the answer depends on the ingredient. For granulated sugar, 1 tablespoon is 12.5 grams, so 4 tablespoons are 50 grams and 8 tablespoons are 100 grams. For all purpose flour, 1 tablespoon is about 7.8 grams. For honey, 1 tablespoon is 21 grams. Find the ingredient’s row in the table in this article and multiply the spoon count by that figure.
How many grams are one tablespoon of flour?
About 7.8 grams for all purpose flour, from the USDA FoodData Central reference weight of 125 grams per cup divided by 16 tablespoons per cup. The true figure on a given day moves with packing and sifting, which is why this guide recommends weighing flour for baking.
How many grams are one tablespoon of sugar?
For granulated sugar, 12.5 grams, from a FoodData Central cup weight of 200 grams divided by 16. Powdered sugar is lighter at 8.0 grams per tablespoon unsifted, and brown sugar is about 13.8 grams per tablespoon packed or about 9.1 grams unpacked. Sugar type changes the answer, so name the sugar as well as the ingredient.
How many grams are one tablespoon of butter?
About 14.2 grams, the tablespoon weight published in FoodData Central for salted butter. Eight tablespoons make one US stick, and 8 x 14.2 = 113.6 grams, matching the listed stick weight of 113 grams within rounding.
How many grams are one tablespoon of honey?
About 21 grams, the tablespoon weight published in FoodData Central. Honey is dense, at about 1.42 grams per milliliter, so it is the heaviest common ingredient in this guide per spoon.
How many grams are one tablespoon of water?
About 14.8 grams with a US tablespoon, because 14.7868 milliliters of water at a density of about 1 gram per milliliter weighs 14.7868 grams. With a metric tablespoon of exactly 15 milliliters, the answer is 15 grams. Water is the baseline every other ingredient is compared with.
How many grams are one tablespoon of cocoa powder?
About 5.4 grams for unsweetened cocoa powder, the tablespoon weight published in FoodData Central. Cocoa is the lightest ingredient in the table, at an implied density of about 0.37 grams per milliliter, because the dry powder traps a large amount of air.
Why do different websites give different grams per tablespoon?
Because they assume different ingredients, tablespoon sizes, or handling states. A figure may be correct for water and wrong for flour, or correct for packed brown sugar and wrong for the same sugar loose. The error is rarely in the arithmetic. It is in applying one set of assumptions to a different ingredient, spoon, or state.
Should I buy a kitchen scale?
If you bake, or if you regularly cook from recipes that give grams, yes. A scale measures mass directly, so the density of the ingredient, the size of the spoon, and the packing of the flour all stop mattering.
Keep reading: Milliliters to Tablespoons: US, Metric, and Australian Answers
Keep reading: How Many Teaspoons in a Tablespoon? The US Answer, Plus the Australian Difference
Keep reading: How Many Tablespoons in a Cup
Keep reading: How Many Grams in a Cup? Why There Is No Single Answer
Keep reading: How Many Grams in an Ounce? The Everyday Answer and the Exceptions
Sources & references
- National Institute of Standards and Technology (NIST), Handbook 44, 2024, Appendix C, General Tables of Units of Measurement. Used for the fluid ounce table value of 29.57353 milliliters, from which the US tablespoon of one half fluid ounce equals 14.7868 milliliters, and for the equivalents table entry listing the measuring tablespoon at 15 milliliters and 3 teaspoons, with the note that tablespoon and teaspoon equivalents are rounded to the nearest milliliter. https://www.nist.gov/system/files/documents/2024/01/14/NIST%20HB%2044%202024%20Appendix%20C%20General%20Tables%20of%20Units%20of%20Measurement.pdf
- USDA FoodData Central, SR Legacy entries, United States Department of Agriculture. Entries used, with the portion weights taken from each entry: Honey (FDC ID 169640), 1 tablespoon 21 g and 1 cup 339 g; Butter, salted (FDC ID 173410), 1 tablespoon 14.2 g, 1 stick 113 g, and 1 cup 227 g; Salt, table (FDC ID 173468), 1 tablespoon 18 g; Oil, olive, salad or cooking (FDC ID 171413), 1 tablespoon 13.5 g; Milk, whole, 3.25% milkfat, with added vitamin D (FDC ID 171265), 1 tablespoon 15.0 g; Wheat flour, white, all purpose, enriched, bleached (FDC ID 168894), 1 cup 125 g; Sugars, granulated (FDC ID 169655), 1 cup 200 g; Sugars, brown (FDC ID 168833), 1 cup packed 220 g and 1 cup unpacked 145 g; Sugars, powdered (FDC ID 169656), 1 tablespoon unsifted 8.0 g, 1 cup unsifted 120 g, and 1 cup sifted 100 g; Cocoa, dry powder, unsweetened (FDC ID 169593), 1 tablespoon 5.4 g and 1 cup 86 g; Cornstarch (FDC ID 169698), 1 cup 128 g; Leavening agents, baking powder, double acting, sodium aluminum sulfate (FDC ID 172803), 1 teaspoon 4.6 g; Peanut butter, smooth style, without salt (FDC ID 172470), 2 tablespoons 32 g; Beverages, water, tap, drinking (FDC ID 173647), 8 fluid ounces 237 g and 1 fluid ounce 29.6 g. https://fdc.nal.usda.gov/
